ErrorCodes.cpp

#include <xrpl/protocol/ErrorCodes.h>
 
#include <xrpl/beast/utility/instrumentation.h>
#include <xrpl/json/json_value.h>
#include <xrpl/protocol/jss.h>
 
#include <array>
#include <stdexcept>
#include <string>
 
namespace xrpl {
namespace RPC {
 
namespace detail {
 
// Unordered array of ErrorInfos, so we don't have to maintain the list
// ordering by hand.
//
// This array will be omitted from the object file; only the sorted version
// will remain in the object file.  But the string literals will remain.
//
// There's a certain amount of tension in determining the correct HTTP
// status to associate with a given RPC error.  Initially all RPC errors
// returned 200 (OK).  And that's the default behavior if no HTTP status code
// is specified below.
//
// The codes currently selected target the load balancer fail-over use case.
// If a query fails on one node but is likely to have a positive outcome
// on a different node, then the failure should return a 4xx/5xx range
// status code.
 
// clang-format off
static constexpr ErrorInfo kUnorderedErrorInfos[]{
    {RpcActMalformed,          "actMalformed",         "Account malformed."},
    {RpcActNotFound,          "actNotFound",          "Account not found."},
    {RpcAlreadyMultisig,       "alreadyMultisig",      "Already multisigned."},
    {RpcAlreadySingleSig,     "alreadySingleSig",     "Already single-signed."},
    {RpcAmendmentBlocked,      "amendmentBlocked",     "Amendment blocked, need upgrade.", 503},
    {RpcExpiredValidatorList, "unlBlocked",           "Validator list expired.", 503},
    {RpcAtxDeprecated,         "deprecated",           "Use the new API or specify a ledger range.", 400},
    {RpcBadKeyType,           "badKeyType",           "Bad key type.", 400},
    {RpcBadFeature,            "badFeature",           "Feature unknown or invalid.", 500},
    {RpcBadIssuer,             "badIssuer",            "Issuer account malformed.", 400},
    {RpcBadMarket,             "badMarket",            "No such market.", 404},
    {RpcBadSecret,             "badSecret",            "Secret does not match account.", 403},
    {RpcBadSeed,               "badSeed",              "Disallowed seed.", 403},
    {RpcBadSyntax,             "badSyntax",            "Syntax error.", 400},
    {RpcChannelMalformed,      "channelMalformed",     "Payment channel is malformed.", 400},
    {RpcChannelAmtMalformed,  "channelAmtMalformed",  "Payment channel amount is malformed.", 400},
    {RpcCommandMissing,        "commandMissing",       "Missing command entry.", 400},
    {RpcDbDeserialization,     "dbDeserialization",    "Database deserialization error.", 502},
    {RpcDstActMalformed,      "dstActMalformed",      "Destination account is malformed.", 400},
    {RpcDstActMissing,        "dstActMissing",        "Destination account not provided.", 400},
    {RpcDstActNotFound,      "dstActNotFound",       "Destination account not found.", 404},
    {RpcDstAmtMalformed,      "dstAmtMalformed",      "Destination amount/currency/issuer is malformed.", 400},
    {RpcDstAmtMissing,        "dstAmtMissing",        "Destination amount/currency/issuer is missing.", 400},
    {RpcDstIsrMalformed,      "dstIsrMalformed",      "Destination issuer is malformed.", 400},
    {RpcExcessiveLgrRange,    "excessiveLgrRange",    "Ledger range exceeds 1000.", 400},
    {RpcForbidden,              "forbidden",            "Bad credentials.", 403},
    {RpcHighFee,               "highFee",              "Current transaction fee exceeds your limit.", 402},
    {RpcInternal,               "internal",             "Internal error.", 500},
    {RpcInvalidLgrRange,      "invalidLgrRange",      "Ledger range is invalid.", 400},
    {RpcInvalidParams,         "invalidParams",        "Invalid parameters.", 400},
    {RpcInvalidHotwallet,      "invalidHotWallet",     "Invalid hotwallet.", 400},
    {RpcIssueMalformed,        "issueMalformed",       "Issue is malformed.", 400},
    {RpcJsonRpc,               "json_rpc",             "JSON-RPC transport error.", 500},
    {RpcLgrIdxsInvalid,       "lgrIdxsInvalid",       "Ledger indexes invalid.", 400},
    {RpcLgrIdxMalformed,      "lgrIdxMalformed",      "Ledger index malformed.", 400},
    {RpcLgrNotFound,          "lgrNotFound",          "Ledger not found.", 404},
    {RpcLgrNotValidated,      "lgrNotValidated",      "Ledger not validated.", 202},
    {RpcMasterDisabled,        "masterDisabled",       "Master key is disabled.", 403},
    {RpcNotEnabled,            "notEnabled",           "Not enabled in configuration.", 501},
    {RpcNotImpl,               "notImpl",              "Not implemented.", 501},
    {RpcNotReady,              "notReady",             "Not ready to handle this request.", 503},
    {RpcNotSupported,          "notSupported",         "Operation not supported.", 501},
    {RpcNoClosed,              "noClosed",             "Closed ledger is unavailable.", 503},
    {RpcNoCurrent,             "noCurrent",            "Current ledger is unavailable.", 503},
    {RpcNotSynced,             "notSynced",            "Not synced to the network.", 503},
    {RpcNoEvents,              "noEvents",             "Current transport does not support events.", 405},
    {RpcNoNetwork,             "noNetwork",            "Not synced to the network.", 503},
    {RpcWrongNetwork,          "wrongNetwork",         "Wrong network.", 503},
    {RpcNoPermission,          "noPermission",         "You don't have permission for this command.", 401},
    {RpcNoPfRequest,          "noPathRequest",        "No pathfinding request in progress.", 404},
    {RpcObjectNotFound,       "objectNotFound",       "The requested object was not found.", 404},
    {RpcPublicMalformed,       "publicMalformed",      "Public key is malformed.", 400},
    {RpcSendmaxMalformed,      "sendMaxMalformed",     "SendMax amount malformed.", 400},
    {RpcSigningMalformed,      "signingMalformed",     "Signing of transaction is malformed.", 400},
    {RpcSlowDown,              "slowDown",             "You are placing too much load on the server.", 429},
    {RpcSrcActMalformed,      "srcActMalformed",      "Source account is malformed.", 400},
    {RpcSrcActMissing,        "srcActMissing",        "Source account not provided.", 400},
    {RpcSrcActNotFound,      "srcActNotFound",       "Source account not found.", 404},
    {RpcDelegateActNotFound, "delegateActNotFound",  "Delegate account not found.", 404},
    {RpcSrcCurMalformed,      "srcCurMalformed",      "Source currency is malformed.", 400},
    {RpcSrcIsrMalformed,      "srcIsrMalformed",      "Source issuer is malformed.", 400},
    {RpcStreamMalformed,       "malformedStream",      "Stream malformed.", 400},
    {RpcTooBusy,               "tooBusy",              "The server is too busy to help you now.", 503},
    {RpcTxnNotFound,          "txnNotFound",          "Transaction not found.", 404},
    {RpcUnknownCommand,        "unknownCmd",           "Unknown method.", 405},
    {RpcOracleMalformed,       "oracleMalformed",      "Oracle request is malformed.", 400},
    {RpcBadCredentials,        "badCredentials",       "Credentials do not exist, are not accepted, or have expired.", 400},
    {RpcTxSigned,              "transactionSigned",    "Transaction should not be signed.", 400},
    {RpcDomainMalformed,       "domainMalformed",      "Domain is malformed.", 400},
    {RpcEntryNotFound,        "entryNotFound",        "Entry not found.", 400},
    {RpcUnexpectedLedgerType, "unexpectedLedgerType", "Unexpected ledger type.", 400},
};
// clang-format on
 
// Sort and validate unorderedErrorInfos at compile time.  Should be
// converted to consteval when get to C++20.
template <int M, int N>
constexpr auto
sortErrorInfos(ErrorInfo const (&unordered)[N]) -> std::array<ErrorInfo, M>
{
    std::array<ErrorInfo, M> ret = {};
 
    for (ErrorInfo const& info : unordered)
    {
        if (info.code <= RpcSuccess || info.code > RpcLast)
            throw(std::out_of_range("Invalid error_code_i"));
 
        // The first valid code follows rpcSUCCESS immediately.
        static_assert(RpcSuccess == 0, "Unexpected error_code_i layout.");
        int const index{info.code - 1};
 
        if (ret[index].code != RpcUnknown)
            throw(std::invalid_argument("Duplicate error_code_i in list"));
 
        ret[index] = info;
    }
 
    // Verify that all entries are filled in starting with 1 and proceeding
    // to rpcLAST.
    //
    // It's okay for there to be missing entries; they will contain the code
    // rpcUNKNOWN.  But other than that all entries should match their index.
    int codeCount{0};
    int expect{RpcBadSyntax - 1};
    for (ErrorInfo const& info : ret)
    {
        ++expect;
        if (info.code == RpcUnknown)
            continue;
 
        if (info.code != expect)
            throw(std::invalid_argument("Empty error_code_i in list"));
        ++codeCount;
    }
    if (expect != RpcLast)
        throw(std::invalid_argument("Insufficient list entries"));
    if (codeCount != N)
        throw(std::invalid_argument("Bad handling of unorderedErrorInfos"));
 
    return ret;
}
 
constexpr auto kSortedErrorInfos{sortErrorInfos<RpcLast>(kUnorderedErrorInfos)};
 
constexpr ErrorInfo kUnknownError;
 
}  // namespace detail
 
//------------------------------------------------------------------------------
 
void
injectError(ErrorCodeI code, json::Value& json)
{
    ErrorInfo const& info(getErrorInfo(code));
    json[jss::error] = info.token;
    json[jss::error_code] = info.code;
    json[jss::error_message] = info.message;
}
 
void
injectError(ErrorCodeI code, std::string const& message, json::Value& json)
{
    ErrorInfo const& info(getErrorInfo(code));
    json[jss::error] = info.token;
    json[jss::error_code] = info.code;
    json[jss::error_message] = message;
}
 
ErrorInfo const&
getErrorInfo(ErrorCodeI code)
{
    if (code <= RpcSuccess || code > RpcLast)
        return detail::kUnknownError;
    return detail::kSortedErrorInfos[code - 1];
}
 
json::Value
makeError(ErrorCodeI code)
{
    json::Value json;
    injectError(code, json);
    return json;
}
 
json::Value
makeError(ErrorCodeI code, std::string const& message)
{
    json::Value json;
    injectError(code, message, json);
    return json;
}
 
bool
containsError(json::Value const& json)
{
    return json.isObject() && json.isMember(jss::error);
}
 
int
errorCodeHttpStatus(ErrorCodeI code)
{
    return getErrorInfo(code).httpStatus;
}
 
}  // namespace RPC
 
std::string
rpcErrorString(json::Value const& jv)
{
    XRPL_ASSERT(RPC::containsError(jv), "xrpl::RPC::rpcErrorString : input contains an error");
    return jv[jss::error].asString() + jv[jss::error_message].asString();
}
 
}  // namespace xrpl